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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/kjhealy/statuses/116238961074277652">Kieran Healy (kjhealy@mastodon.social)'s status on Tuesday, 17-Mar-2026 06:17:12 JST</a><a href="https://mastodon.social/@kjhealy" title="kjhealy@mastodon.social"><img src="https://gnusocial.jp/avatar/32546-48-20221216172429.webp" width="48" height="48" alt="Kieran Healy" style="position: absolute; left: 0; top: 0;">Kieran Healy</a><div><ul><li><li><a href="https://gnusocial.jp/user/371390" title="recdiffs@mastodon.social">Reconcilable Differences</a></li></ul></div></section><article><p><a href="https://mastodon.social/@hotdogsladies">@hotdogsladies</a> A nice big Baby Boom poster for you about the dread year of 1946 and the march of time in general, as per <a href="https://mastodon.social/@RecDiffs">@RecDiffs</a> discussion. Some more detail at <a href="https://kieranhealy.org/blog/archives/2023/12/20/the-baby-boom-again/" rel="nofollow">https://kieranhealy.org/blog/archives/2023/12/20/the-baby-boom-again/</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/6241946#notice-12301009">In conversation</a><time datetime="2026-03-17T06:17:12+09:00" title="Tuesday, 17-Mar-2026 06:17:12 JST">about 5 months ago</time> <span>from <span><a href="https://mastodon.social/@kjhealy/116238961074277652" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@kjhealy/116238961074277652">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/5898705">Details at https://kieranhealy.org/blog/archives/2023/12/20/the-baby-boom-again/40
50
60
70
Visualizing the Baby Boom
Average Daily Births per Million Population in the United States, 1933-2015
The Time Series as a Heatmap
The Time Series as a Line Graph
ping, in lovember of 12..
The Trend Component of the Time Series
The Seasonal Component of the Time Series
The Remainder after identifying the Trend and Seasonal Components
The Relative Age Structure of the U.S. Population by Decade
tructure depends on mortality and migration as well as the birth rat
The Raw Number of Births per Month
250K-
200K-
1935
1975
Year</a></label><br><a href="https://files.mastodon.social/media_attachments/files/116/238/960/739/723/894/original/0c28d98a7bd1db40.jpeg" rel="external">https://files.mastodon.social/media_attachments/files/116/238/960/739/723/894/original/0c28d98a7bd1db40.jpeg</a></li><li><article><header><div>Domain not in remote thumbnail source whitelist: kieranhealy.org</div><h5><a href="https://kieranhealy.org/blog/archives/2023/12/20/the-baby-boom-again/">The Baby Boom Again</a></h5><div> from <span>Kieran Healy</span></div></header><div>Prompted by a local data visualization event, I revisited my old “Visualizing the Baby Boom” poster and added a few things to it. The additions are there to add a little extra context and to bring out some relevant comparisons. There are new rows showing snapshots of the country’s population pyramid every ten years between 1935 and 2015, to show the boomer cohort moving up through the population’s age distribution. Following on from some discussion on the socials with Gina C. Pierters and Carl Schmertmann, I also added a row at the bottom showing a basic time series of the raw number of births per month. The idea here is to bring out the point that while the birth rate has fallen sharply since the peak of the boom, the absolute number of births has been comparatively more stable (with the implication, of course, that the overall population has grown substantially.) Thanks also to Dr Drang for catching a misaligned label. Here’s the figure. You can also get a PDF version at no extra charge.</div><footer></footer></article></li></ol></footer></blockquote>

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Kieran Healy (kjhealy@mastodon.social)'s status on Tuesday, 17-Mar-2026 06:17:12 JSTKieran Healy
- Merlin Mann
- Reconcilable Differences
@hotdogsladies A nice big Baby Boom poster for you about the dread year of 1946 and the march of time in general, as per @RecDiffs discussion. Some more detail at https://kieranhealy.org/blog/archives/2023/12/20/the-baby-boom-again/
In conversationabout 5 months ago from mastodon.socialpermalink
Attachments
1. Details at https://kieranhealy.org/blog/archives/2023/12/20/the-baby-boom-again/ 40 50 60 70 Visualizing the Baby Boom Average Daily Births per Million Population in the United States, 1933-2015 The Time Series as a Heatmap The Time Series as a Line Graph ping, in lovember of 12.. The Trend Component of the Time Series The Seasonal Component of the Time Series The Remainder after identifying the Trend and Seasonal Components The Relative Age Structure of the U.S. Population by Decade tructure depends on mortality and migration as well as the birth rat The Raw Number of Births per Month 250K- 200K- 1935 1975 Year
  https://files.mastodon.social/media_attachments/files/116/238/960/739/723/894/original/0c28d98a7bd1db40.jpeg
2. Domain not in remote thumbnail source whitelist: kieranhealy.org
  The Baby Boom Again
  from Kieran Healy
  Prompted by a local data visualization event, I revisited my old “Visualizing the Baby Boom” poster and added a few things to it. The additions are there to add a little extra context and to bring out some relevant comparisons. There are new rows showing snapshots of the country’s population pyramid every ten years between 1935 and 2015, to show the boomer cohort moving up through the population’s age distribution. Following on from some discussion on the socials with Gina C. Pierters and Carl Schmertmann, I also added a row at the bottom showing a basic time series of the raw number of births per month. The idea here is to bring out the point that while the birth rate has fallen sharply since the peak of the boom, the absolute number of births has been comparatively more stable (with the implication, of course, that the overall population has grown substantially.) Thanks also to Dr Drang for catching a misaligned label. Here’s the figure. You can also get a PDF version at no extra charge.

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